Method for producing concrete aggregate
SUBSTANCE: method for producing the concrete aggregate includes preparation of mass based on low-melting clays, capable to swell under conditions of heat treatment, its hydration up to 17-23%, formation of granules, melting into the surface of moulded granules of the crushed cement clinker sieved through mesh No. 5, drying, calcining at a temperature of 1100°C, cooling.
EFFECT: increase of the bond strength of aggregate with cement stone.
The invention relates to the production of aggregates for concrete.
A known method of manufacturing aggregate (expanded clay), including the preparation of the clay mass, moisture, forming granules, drying, calcination and cooling .
The task of the invention to provide a filler with a rough surface, increasing the strength of adhesion of the filler with cement stone.
The technical result is achieved in that in the method of manufacturing aggregate for concrete, including the preparation of the clay mass, moisture, forming granules, drying, firing and cooling, the surface of the formed granules put a layer of crushed and sifted through mesh No. 5 cement clinker.
The method is illustrated by the following example.
On the basis of fusible clays, able to swell in the heat-treated conditions, prepare the clay mass, moisturize up to 17-23% and using a perforated roller is formed into granules. Cement clinker crushed and sieved through sieve No. 5. On the surface of the formed granules applied (vtaplivajut) layer of crushed cement clinker. The granules are dried to a moisture content of 1-6% and calcined, for example, in a rotary drum furnaces at a temperature of 1100°C. the Finished pellets are cooled to a temperature of 20-50°C and sent to the warehouse of finished products. The aggregate received the first proposed method, has an uneven surface, is strongly linked with cement stone.
The source of information
1. Dudarov I., General technology of silicates. - M.: Stroiizdat, 1987. - S. 314-321.
A method of manufacturing aggregate for concrete, including the preparation of mass on the basis of fusible clays, able to swell in the conditions of the heat treatment, moisture up to 17-23%, molding granules, vtaplivaniem in the surface of the formed granules were sifted through mesh No. 5 crushed cement clinker, drying, calcination at 1100°C, cooling.
SUBSTANCE: in this method to produce a dry anti-frost complex additive, including mixing of a plasticising component, a salt component and an intensifier of anti-frost action, the intensifier of anti-frost action is a water-soluble organic component not containing salt-producing functional groups, with the HLB value of 2.8-4.3, which is dried on a carrier - the plasticising component, and the produced powdered product is mixed with the dry salt component to produce the following content of components, wt %: plasticising component - 10-80, salt component - 10-75, intensifier of anti-frost action - 5-15. In the version of the method to produce a dry anti-frost complex additive, including mixing of a plasticising component, a salt component and an intensifier of anti-frost action, the intensifier of anti-frost action is a water-soluble organic component not containing salt-producing functional groups, with the HLB value of 2.8-4.3, which is mixed with the dry plasticising component, and the produced paste-like mass is mixed with the dry salt component to produce loose mass. The invention also relates to composition of the dry anti-frost complex additive produced by above methods.
EFFECT: lower doses of complex anti-frost additives due to increase of their technical efficiency and narrower range of recommended doses for entire temperature range of their application with provision of convenience of their transportation and storage.
7 cl, 2 tbl, 10 ex
SUBSTANCE: invention relates to construction and can be used for construction of an earth bed and a device of reinforced road bases on roads of categories I-V in road climatic zones II-V, as well as pavements on roads of categories IV-V as material for construction of earth bed fills and reinforcement of soil bases of construction and other sites. Improved road-building soil is characterised by the fact that it is obtained from a mixture containing the following, wt %: cement 5-15, waste of thermal utilisation of oil slurries - ash and slag with density of 1.2 to 1.6 kg/dm3 30-40, mineral filler 0-30, peat sorbent 2-4, drilling slurry with density of 1.3 to 1.8 kg/dm3 is the rest.
EFFECT: reduction of consumption of cement and fillers; utilisation of wastes.
7 dwg, 7 ex
SUBSTANCE: previously prepared samples with various quantity of a filler in a highly dispersed condition for a dry construction mix are placed into a hollow part of metal washers, placed on a metal plate, are compacted by any available method under permanent load of up to 5 MPa per 1 cm2 of sample surface for 10-15 seconds, then marks are applied on the surface of each sample in the form of drops of a solution of various concentration, wetting angles of samples are measured θ, a curve of dependence is built cosθ-1=f(1/σl), where σl - surface tension of the liquid, they determine the angle of inclination of this functional dependence a for each sample of different composition, the curve of dependence a is built on quantity of mix components, and by the point of break of the curve of dependence they define the optimal content of a modifier in the tested object.
EFFECT: reduced number of tests and higher accuracy of mixture composition selection.
2 cl, 2 dwg, 1 tbl
SUBSTANCE: nanocomposite material contains, wt %: mineral binder 83.7-83.9, mineral filler 2.1-2.3, fraction of carbon nanoparticles 0.00002, distilled water 13.79998-14.19998.
EFFECT: improvement of material characteristics, providing protection from neutron radiation flows, provision of technological mobility of working mixture in the process of pouring construction elements.
SUBSTANCE: decorative facing material includes, wt %: ground sheet glass 75.0-77.0; ground tuff 8.0-10.0; borax 10.0-13.0; ground talc 3.0-4.0. Frost resistance of the material makes at least 25 cycles. Components are dosed in required quantities. Sheet glass (broken glass) previously ground to powdered condition is mixed with borax and tuff and talc ground to powder condition. The produced mass is laid into detachable metal moulds, compacted and sintered at 800-870°C.
EFFECT: increased frost resistance of produced material.
SUBSTANCE: raw material mixture for obtaining artificial rock contains, wt %: Portland cement 26-30; quartz sand 47.3-55.85; water 16-20; fibrous metalloceramics 2.0-2.5; technical lignosulfonate LST 0.15-0.2.
EFFECT: increased strength.
SUBSTANCE: charge for obtaining a decorative-facing material includes, wt %: milled glass 50.0-55.0; milled tuff 20.0-25.0; liquid glass 10.0-15.0; clay 10.0-15.0.
EFFECT: increased frost resistance of the materials.
SUBSTANCE: invention relates to preparations used for increasing water resistance of concrete, namely to elaboration of novel concrete-colmating (imperforating concrete pores) composition. In basic version composition represents mixture of salts, formed by metals from the group: sodium, potassium, calcium, aluminium, and acids from the group: nitric, formic, sulfuric, carbonic, with the following ion ratio (ion weight in composition, g)/(100 g of composition): sodium 5.6-32, calcium 0.4-17.2, potassium 1.5-27.2, aluminium 0.5-7.6, nitrate 4.1-62.1, formiate 0.6-29.7, sulfate 10.3-54.7, carbonate 1.1-29.7, as well as complex-forming additives (such as, for instance, carbamide, nitryltriacetic acid, imino-N,N-diacetic-N-methylene phosphonic acid; glycin-N,N-di(methylene phosphonic) acid, iminodi(methylene phosphonic) acid; diaminopropanol- N,N,N',N'-tetraacetic acid; 2-hydroxypropylene diamine- N,N,N',N'-tetra(methylene phosphonic) acid; 2,3-dihydrobutylene-1,4-diamine- N,N,N',N'-tetra(methylene phosphonic) acid; 2,3-dihydroxybutylene-1,4-diamine- N,N,N',N'-tetraacetic acid; nitryl-tri(methylene phosphonic) acid; 1-hydroxyethylene diphosphonic acid; ethylenediamin- N,N,N',N'- tetra(methylene phosphonic) acid; ethylenediamine-N,N,N',N'- tetraacetic acid; in amount not more than 20% of colmating composition weight.
EFFECT: extension of arsenal of preparations, used to increase concrete water resistance.
5 cl, 3 tbl
SUBSTANCE: in the method to manufacture wood concrete items with production of a base on their surface for plastering, providing for preparation and dosing of a hydraulic binder, ground cane stems, water, mixing of components, moulding of items with vibration, hardening, moulding with vibration is carried out so that cane stems cut into sections with length of 4-6 cm are located near the surface of the items, with one end staying in the mix, and with the other one - protruding outside and forming a base for application of plaster.
EFFECT: higher convenience of plaster application onto surface of items.
SUBSTANCE: additive comprises the following components, wt %: microorganisms of Leuconostoc mesenteroides type cultivated on a synthetic nutrient medium 0.5-2.7; microquartz 97.3-99.5.
EFFECT: increased mobility of a construction mix and concrete strength.
SUBSTANCE: group of inventions relates to dry concrete or mortar composition, containing porous granules and to concrete or mortar, manufactured from said composition. Dry concrete or mortar composition, containing particles-cores, to the surfaces of which particle of hydraulic binding substance are fixed, and separate particles of hydraulic binding substance, particles-cores consist of inert or pozzolanic material and together with binding substance attached to them form porous granules, which, in their turn, are fixed to the surface of dry filling agent. Concrete or mortar, manufactured from said dry composition, mixed with water, is described. Invention is developed in dependent items of the invention formula.
EFFECT: increase of strength and fire resistance of concrete, obtained from claimed dry composition.
25 cl, 2 ex
SUBSTANCE: in a method of producing a porous aggregate, which includes preparation of a ceramic casting mixture, immersing aggregate particles into the mixture, drying said particles and firing, drying is carried out to moisture content of no more than 6%, firing is carried out at temperature of 850-1200°C and the aggregate used is natural vermiculite with particle size of 5-10 mm, wherein the mixture has the following composition, wt %: natural vermiculite 20-25, clay 24-30, water 45-50, colouring additive1-5. The method includes impregnating the porous aggregate with sodium ethyl siliconate or sodium methyl siliconate, followed by drying.
EFFECT: obtaining a light-weight, high-strength decorative porous aggregate.
2 cl, 3 ex
SUBSTANCE: raw mixture for production of coarse aggregate shell contains, wt %: Portland cement 30.0-35.0; casein glue 4.0-7.0; fly ash 28.0-31.0; water 30.0-35.0.
EFFECT: increase of bonding strength of shell with the surface of the coarse aggregate.
SUBSTANCE: filler for concrete is made in the form of grain of round shape, having a cavity 3, formed by means of adhesion of two parts 1 and 2, made from clayey raw materials by moulding with subsequent baking, with a porous body 4 placed in the cavity 3, produced in process of baking of adhered parts 1 and 2 by foaming of foam glass charge including the following components, wt %: ground silicate glass 93-97 and gasifier - chalk or marble or coke 3-7, besides, at least one of parts is perforated 5.
EFFECT: production of a light strong filler having heat insulation properties, simplified technology of its manufacturing.
1 dwg, 1 tbl
SUBSTANCE: raw mix to make a shell of a coarse filler used to decorate flower gardens and flowerbeds contains the following components, wt %: liquid glass with density of 1300-1500 kg/m3 30-35, urea 5-15, water 30-35, mineral filler 20-30.
EFFECT: making a shell suitable for application onto surface of coarse filler used for decoration of flower gardens and flowerbeds in spring and summer, with its subsequent decomposition in autumn and winter and soil fertilisation.
SUBSTANCE: from a ceramic mass they form granules with subsequent drying and baking. Glazing suspension is applied onto surface of granules, where they add fine quartz sand and/or fine corundum sand in the amount of 5-30% of its mass. The layer of glazing suspension is melted.
EFFECT: increased adhesion of haydite gravel with glazing coating to cement stone.
1 tbl, 3 ex
SUBSTANCE: invention relates to production porous aggregates for concrete. In the method of producing a porous aggregate, which involves preparation of a ceramic casting mixture, immersing aggregate particles into the mixture, drying said particles and firing, drying is carried out to moisture content of 1-8 %, firing is carried out at temperature of 1100-1200°C and the aggregate used is natural schungite, wherein the mixture has the following composition, wt %: natural schungite 10-15, flue ash 10-15, clay 25-30, water 45-50.
EFFECT: obtaining light and strong porous aggregate.
SUBSTANCE: raw material mixture for manufacturing of coarse aggregate envelope contains the following components, wt %: portland cement 36.5-43.5; urea 0.2-0.3; casein adhesive 2.5-3.0; quartz sand or marshalit 15.0-20.0; phenylethoxysiloxane 0.2-0.3; water 36.0-40.0.
EFFECT: improving water resistance of coarse aggregate envelope.
SUBSTANCE: raw material mixture for manufacturing of coarse aggregate envelope contains the following components, wt %: portland cement 33.5-42.8; urea 0.7-1.3; casein adhesive 2.5-3.0; quartz sand or marshalit 15.0-20.0; natrium ethyl siliconate or natrium methyl siliconate 2.5-3.0; water 36.0-40.0.
EFFECT: improving water resistance of coarse aggregate envelope.
SUBSTANCE: invention relates to the industry of building materials, specifically to compositions of crude mixtures for making building articles, and can be used in production artificial building stone by pressing. The technical result is achieved owing to that 5% acrylic acid solution is used as the modifier of screenings from crushing carbonate rocks. The mixture for making artificial building stone consists of screenings from crushing carbonate rocks, portland cement and water. According to the invention, at least 15 minutes before preparation, the screenings from crushing carbonate rocks are treated with 5% acrylic acid, followed by addition of portland cement and water, with the following ratio of components, wt %: portland cement 20-30, screenings from crushing carbonate rocks 70-80, said modifier solution 13±1 of the mass of screenings from crushing carbonate rocks, water 13±1 of the mass of portland cement.
EFFECT: high strength of the artificial building stone with low cement consumption.
FIELD: cement concrete manufacturing.
SUBSTANCE: cement concrete filler is activated by application of liquid glass solution on its surface using liquid glass solution with density of 1.25-1.50 g/cm3 in amount ≤3 % in respect to filler mass. Application of liquid glass solution on the surface of fine filler is carried out by spraying in blade blender following by treatment in rod-type blender with specific supplied power of 1-6 kW.h to 1 t of filler. Curing is carried out by heat treatment at 60-2500C or holding at room temperature.
EFFECT: cement stone of increased cohesive resistance with filler and cement concrete of improved quality.
3 cl, 2 tbl